Home / 661,400.18-912,897.60-406,603.76

Finding the Fourth Proportional to 661,400.18, 912,897.60 and 406,603.76

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Solution

The fourth proportional to 661,400.18, 912,897.60 and 406,603.76 is: 561,214.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,400.18 : 912,897.60 = 406,603.76 : x
  2. Step 2: Convert to fraction form
    661,400.18/912,897.60 = 406,603.76/x
  3. Step 3: Cross multiply
    661,400.18x = 912,897.60 × 406,603.76
  4. Step 4: Simplify right side
    661,400.18x = 371,187,596,654.98
  5. Step 5: Solve for x
    x = 371,187,596,654.98/661,400.18
  6. Step 6: Final answer
    x = 561,214.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.